Examples with HttpHeaders com.lzy.okgo.model.HttpHeaders used on opensource projects

Example 6 with HttpHeaders

use of com.lzy.okgo.model.HttpHeaders in project okhttp-OkGo by jeasonlzy.

the class HeaderParser method addCacheHeaders.

/**
     * 对每个请求添加默认的请求头，如果有缓存，并返回缓存实体对象
     * Cache-Control: max-age=0                            以秒为单位
     * If-Modified-Since: Mon, 19 Nov 2012 08:38:01 GMT    缓存文件的最后修改时间。
     * If-None-Match: "0693f67a67cc1:0"                    缓存文件的ETag值
     * Cache-Control: no-cache                             不使用缓存
     * Pragma: no-cache                                    不使用缓存
     * Accept-Language: zh-CN,zh;q=0.8                     支持的语言
     * User-Agent:                                         用户代理，它的信息包括硬件平台、系统软件、应用软件和用户个人偏好
     * Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36
     *
     * @param request     请求类
     * @param cacheEntity 缓存实体类
     * @param cacheMode   缓存模式
     */
public static <T> void addCacheHeaders(BaseRequest request, CacheEntity<T> cacheEntity, CacheMode cacheMode) {
    //1. 按照标准的 http 协议，添加304相关请求头
    if (cacheEntity != null && cacheMode == CacheMode.DEFAULT) {
        HttpHeaders responseHeaders = cacheEntity.getResponseHeaders();
        if (responseHeaders != null) {
            String eTag = responseHeaders.get(HttpHeaders.HEAD_KEY_E_TAG);
            if (eTag != null)
                request.headers(HttpHeaders.HEAD_KEY_IF_NONE_MATCH, eTag);
            long lastModified = HttpHeaders.getLastModified(responseHeaders.get(HttpHeaders.HEAD_KEY_LAST_MODIFIED));
            if (lastModified > 0)
                request.headers(HttpHeaders.HEAD_KEY_IF_MODIFIED_SINCE, HttpHeaders.formatMillisToGMT(lastModified));
        }
    }
}